(by extension) A poetic form in which the sequence of words reads the same in either direction.
(by extension) A sequence of items that follows the same pattern both forwards and backwards.
(genetics) A stretch of DNA in which the sequence of nucleotides on one strand are in the reverse order to that of the complementary strand
A word, phrase, number or any other sequence of units which has the property of reading the same forwards as it does backwards, character for character, sometimes disregarding punctuation, capitalization and diacritics.
